exported PDF larger than artboard size

[nvdg]

Hi, I created artboards of 1945 x 1257px which, when viewed in Illustrator at 100% are just slightly smaller than the size of my screen, but when I export these artboards to PDF the scale is suddenly much larger. If I view them at 100% in Acrobat, they are much bigger than they should be, about 130% of the Illustrator artboards. Why is 100% in Acrobat not the same as 100% in Illustrator? 

Ai document raster settings are 72dpi. Exported PDF is set "Smallest file size" with mage compression set to 72dpi. No matter what settings I change, the PDF in Acrobat is always bigger. 

I've been using Illustrator for many years and I don't remember ever having run into this problem before. I recently bought a new Macbook pro and installed Illustrator. Is there some setting I missed??

Thanks 

[Doug A Roberts · Accepted solution]

Probably because, in Acrobat, you can specify what screen resolution you want it to simulate (in PPI), and this setting may not match that of Illustrator.

 

[nvdg]

Thank you!! That was it. I changed it to 72dpi and now it looks fine. I don't know why I didn't think of this. For some reason I thought it had something to do with the way the PDF was being exported. Thanks so much!